@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,500;1,400&display=swap');

/* ===== CSS 变量 ===== */
:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-dark: #26171f;
  --c-dark-2: #1a0f16;
  --c-dark-3: #320e1f;
  --c-text: #f0e6ec;
  --c-text-muted: #b08ea0;
  --c-border: rgba(255, 0, 128, 0.25);
  --c-card-bg: rgba(38, 23, 31, 0.85);
  --nav-width: 240px;
  --radius: 4px;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;
  --transition: 0.25s ease;
}

/* ===== 重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background-color: var(--c-dark);
  color: var(--c-text);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

body.dark-aurora {
  background-color: var(--c-dark-2);
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 10%, rgba(255,0,128,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(255,0,255,0.14) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 50% 50%, rgba(50,14,31,0.9) 0%, transparent 80%);
}

/* ===== Aurora 动态背景 ===== */
@keyframes aurora-flow {
  0%   { background-position: 0% 50%; filter: hue-rotate(0deg); }
  50%  { background-position: 100% 50%; filter: hue-rotate(30deg); }
  100% { background-position: 0% 50%; filter: hue-rotate(0deg); }
}

@keyframes shimmer {
  0%   { opacity: 0.5; transform: translateX(-100%) skewX(-15deg); }
  100% { opacity: 0; transform: translateX(300%) skewX(-15deg); }
}

@keyframes float-blob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(20px, -15px) scale(1.05); }
  66%  { transform: translate(-10px, 10px) scale(0.97); }
}

/* ===== 页面骨架 ===== */
.page-shell {
  display: flex;
  min-height: 100vh;
}

/* ===== 侧边导航 ===== */
.sidenav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: rgba(26, 15, 22, 0.97);
  border-right: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  backdrop-filter: blur(12px);
}

.sidenav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), var(--c-primary));
  background-size: 200% 100%;
  animation: aurora-flow 4s ease infinite;
}

.sidenav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 20px 12px;
  border-bottom: 1px solid var(--c-border);
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  object-fit: contain;
}

.brand-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-primary);
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.sidenav-tagline {
  padding: 10px 20px;
  font-size: 11px;
  color: var(--c-text-muted);
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--c-border);
}

.sidenav-links {
  flex: 1;
  padding: 16px 0;
  list-style: none;
}

.sidenav-links dt,
.sidenav-links dd {
  display: block;
}

.sidenav-links dt a,
.sidenav-links dd a {
  display: block;
  padding: 11px 20px;
  font-size: 13px;
  color: var(--c-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition), background var(--transition), padding-left var(--transition);
  border-left: 2px solid transparent;
  min-height: 40px;
  line-height: 1.5;
}

.sidenav-links dt a:hover,
.sidenav-links dd a:hover {
  color: var(--c-primary);
  background: rgba(255,0,128,0.07);
  padding-left: 26px;
  border-left-color: var(--c-primary);
}

.sidenav-footer-note {
  padding: 16px 20px;
  border-top: 1px solid var(--c-border);
  font-size: 11px;
  color: var(--c-text-muted);
}

/* ===== 主体区域 ===== */
.page-body {
  margin-left: var(--nav-width);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(255,0,128,0.08) 0%,
    rgba(255,0,255,0.05) 50%,
    transparent 100%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  width: 100%;
  padding: 60px 48px;
  gap: 48px;
}

.hero-media {
  flex: 0 0 45%;
  max-width: 45%;
}

.hero-media img.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  object-fit: cover;
  max-height: 420px;
}

.hero-placeholder {
  width: 100%;
  height: 380px;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
  background: var(--c-dark-3);
}

.aurora-blob {
  position: absolute;
  inset: -20%;
  background: conic-gradient(
    from 0deg at 50% 50%,
    rgba(255,0,128,0.4) 0deg,
    rgba(255,0,255,0.3) 120deg,
    rgba(38,23,31,0.8) 240deg,
    rgba(255,0,128,0.4) 360deg
  );
  filter: blur(40px);
  animation: float-blob 8s ease-in-out infinite;
}

.aurora-blob.large {
  inset: -30%;
}

.hero-text {
  flex: 1;
  text-align: right;
}

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--c-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero h1,
.feature-hero h1,
.pricing-banner h1,
.faq-banner h1,
.about-banner h1,
.contact-banner h1,
.policy-banner h1,
.default-banner h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 60%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 15px;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
}

.hero-bg-number {
  position: absolute;
  right: 40px;
  bottom: -20px;
  font-size: clamp(120px, 20vw, 220px);
  font-weight: 500;
  color: rgba(255,0,128,0.04);
  line-height: 1;
  letter-spacing: -0.05em;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  transition: opacity var(--transition), transform var(--transition);
  min-height: 44px;
  line-height: 1.5;
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 100%;
  background: rgba(255,255,255,0.2);
  transform: translateX(-100%) skewX(-15deg);
}

.btn-primary:hover::after {
  animation: shimmer 0.6s ease forwards;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid var(--c-primary);
  color: var(--c-primary);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  line-height: 1.5;
}

.btn-outline:hover {
  background: var(--c-primary);
  color: #fff;
}

/* ===== Feature Hero ===== */
.feature-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(135deg, var(--c-dark-2) 0%, var(--c-dark-3) 100%);
}

.feature-hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  width: 100%;
  padding: 60px 48px;
  gap: 48px;
}

.feature-hero-media {
  flex: 0 0 42%;
  max-width: 42%;
}

.feature-hero-media img.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  object-fit: cover;
  max-height: 400px;
}

.feature-hero-text {
  flex: 1;
  text-align: right;
}

/* ===== 专题横幅（pricing / faq / contact / policy / default / about） ===== */
.pricing-banner,
.faq-banner,
.contact-banner,
.policy-banner,
.default-banner {
  position: relative;
  padding: 64px 48px 48px;
  border-bottom: 1px solid var(--c-border);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255,0,128,0.06) 0%, rgba(255,0,255,0.04) 100%);
}

.pricing-banner::before,
.faq-banner::before,
.contact-banner::before,
.policy-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(255,0,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.banner-desc {
  font-size: 15px;
  color: var(--c-text-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-top: 8px;
}

.about-banner {
  position: relative;
  border-bottom: 1px solid var(--c-border);
  overflow: hidden;
}

.about-banner-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  padding: 60px 48px;
}

.about-media {
  flex: 0 0 40%;
  max-width: 40%;
}

.about-media img.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  max-height: 360px;
  object-fit: cover;
}

.about-media .hero-placeholder {
  height: 300px;
}

.about-intro {
  flex: 1;
}

.about-intro p {
  color: var(--c-text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-top: 12px;
}

/* ===== 主内容区域 ===== */
main {
  flex: 1;
  padding: 48px 0;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 48px;
}

/* 结构契约：main > div.wrap > article > section */
.content-section {
  margin-bottom: 48px;
}

.main-content {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

/* ===== 侧边栏（aside 在左） ===== */
.content-aside {
  flex: 0 0 200px;
  max-width: 200px;
  position: sticky;
  top: 24px;
}

.content-aside h3 {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}

.aside-links {
  list-style: none;
  margin-bottom: 20px;
}

.aside-links li {
  border-bottom: 1px solid rgba(255,0,128,0.08);
}

.aside-links li a {
  display: block;
  padding: 9px 0;
  font-size: 12px;
  color: var(--c-text-muted);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
  min-height: 40px;
  line-height: 1.5;
}

.aside-links li a:hover {
  color: var(--c-primary);
  padding-left: 6px;
}

.aside-cta {
  margin-top: 16px;
}

/* ===== 正文区域 ===== */
.content-body {
  flex: 1;
  min-width: 0;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 12px;
  color: var(--c-text-muted);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-border);
}

.content-body h2 {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--c-text);
  margin: 32px 0 16px;
  letter-spacing: -0.01em;
}

.content-body h2 span {
  background: linear-gradient(90deg, #fff, var(--c-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.content-body h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--c-text);
  margin: 24px 0 12px;
}

.content-body h3 span {
  color: var(--c-secondary);
}

.content-body p {
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-body ul,
.content-body ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.content-body li {
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 6px;
}

.content-body a {
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,0,128,0.3);
  transition: border-color var(--transition);
}

.content-body a:hover {
  border-bottom-color: var(--c-primary);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 14px;
}

.content-body table th,
.content-body table td {
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  text-align: left;
  line-height: 1.6;
}

.content-body table th {
  background: rgba(255,0,128,0.08);
  color: var(--c-primary);
  font-weight: 500;
}

.content-body table tr:hover td {
  background: rgba(255,0,128,0.04);
}

/* ===== 首页功能卡片网格 ===== */
.features-grid {
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--c-border);
}

.features-grid h2 {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 28px;
  color: var(--c-text);
}

.features-grid h2 span {
  background: linear-gradient(90deg, #fff, var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: rgba(255,0,128,0.5);
  transform: translateY(-2px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card h3 {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--c-text);
}

.feature-card h3 span {
  color: var(--c-text);
}

.card-date {
  font-size: 11px;
  color: var(--c-text-muted);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-size: 12px;
  color: var(--c-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: letter-spacing var(--transition);
}

.card-link:hover {
  letter-spacing: 0.1em;
}

/* ===== 定价表 ===== */
.pricing-plans {
  margin-bottom: 32px;
}

.plan-card {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--c-card-bg);
  margin-bottom: 16px;
}

.plan-highlight {
  border-color: rgba(255,0,255,0.35);
  background: rgba(255,0,255,0.04);
}

.plan-highlight h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
}

.pricing-table td {
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  font-size: 14px;
}

.pricing-table .plan-name {
  color: var(--c-text);
  font-weight: 500;
}

.pricing-table .plan-price {
  color: var(--c-primary);
  font-weight: 500;
}

/* ===== FAQ 样式 ===== */
.faq-body .content-body h2 {
  margin-top: 0;
}

/* ===== 联系表单提示 ===== */
.contact-form-note {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: rgba(255,0,128,0.04);
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ===== 页脚（极简：仅 p + small，nav 独立结构） ===== */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: 32px 48px;
  text-align: center;
  background: rgba(26,15,22,0.6);
}

.site-footer p {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 8px;
}

.site-footer small {
  font-size: 11px;
  color: rgba(176,142,160,0.6);
  display: block;
  margin-bottom: 20px;
}

.site-footer nav {
  margin-top: 16px;
}

.site-footer nav dl {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 0;
}

.site-footer nav dt,
.site-footer nav dd {
  display: inline;
}

.site-footer nav dt a,
.site-footer nav dd a {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--c-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  min-height: 40px;
  line-height: 28px;
}

.site-footer nav dt a:hover,
.site-footer nav dd a:hover {
  color: var(--c-primary);
}

/* ===== 子页列表表格（契约：table > tbody > tr > td） ===== */
.children-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.children-table thead th {
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  background: rgba(255,0,128,0.08);
  color: var(--c-primary);
  font-weight: 500;
  text-align: left;
  letter-spacing: 0.05em;
}

.children-table tbody tr td {
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  vertical-align: top;
  line-height: 1.6;
}

.children-table tbody tr:hover td {
  background: rgba(255,0,128,0.04);
}

.children-table .td-title a {
  color: var(--c-primary);
  text-decoration: none;
  font-weight: 500;
}

.children-table .td-title a:hover {
  text-decoration: underline;
}

.children-table .td-desc {
  color: var(--c-text-muted);
  font-size: 13px;
}

/* ===== 通用图片 ===== */
img {
  max-width: 100%;
  height: auto;
}

/* ===== 滚动视差（JS 辅助） ===== */
.parallax-hero {
  will-change: transform;
  transition: transform 0.05s linear;
}

/* ===== 移动端响应 ===== */
@media (max-width: 900px) {
  :root {
    --nav-width: 0px;
  }

  .page-shell {
    flex-direction: column;
  }

  .sidenav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    max-height: 60px;
    flex-direction: row;
    align-items: center;
    overflow: hidden;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    z-index: 200;
    transition: max-height 0.3s ease;
  }

  .sidenav.open {
    max-height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    overflow-y: auto;
  }

  .sidenav-brand {
    flex-direction: row;
    padding: 12px 16px;
    border-bottom: none;
    flex: 1;
  }

  .sidenav-tagline {
    display: none;
  }

  .sidenav.open .sidenav-tagline {
    display: block;
    width: 100%;
  }

  .sidenav-links {
    width: 100%;
    padding: 8px 0;
  }

  .sidenav-links dt a,
  .sidenav-links dd a {
    padding: 12px 20px;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    color: var(--c-text);
    cursor: pointer;
    font-size: 20px;
    padding: 0;
    flex-shrink: 0;
    margin-right: 8px;
  }

  .page-body {
    margin-left: 0;
    margin-top: 60px;
  }

  .hero-inner,
  .feature-hero-inner,
  .about-banner-inner {
    flex-direction: column;
    padding: 40px 24px;
    gap: 28px;
  }

  .hero-media,
  .feature-hero-media,
  .about-media {
    flex: none;
    max-width: 100%;
    width: 100%;
  }

  .hero-text,
  .feature-hero-text {
    text-align: left;
  }

  .hero-desc {
    margin-left: 0;
    max-width: 100%;
  }

  .hero-bg-number {
    font-size: 80px;
    right: 16px;
    bottom: -10px;
  }

  .wrap {
    padding: 0 20px;
  }

  .main-content {
    flex-direction: column;
  }

  .content-aside {
    flex: none;
    max-width: 100%;
    width: 100%;
    position: static;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 20px;
    margin-bottom: 20px;
  }

  .pricing-banner,
  .faq-banner,
  .contact-banner,
  .policy-banner,
  .default-banner {
    padding: 40px 20px 32px;
  }

  .about-intro {
    flex: none;
    width: 100%;
  }

  .site-footer {
    padding: 24px 20px;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }

  main {
    padding: 32px 0;
  }
}

@media (max-width: 560px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .feature-hero h1,
  .pricing-banner h1,
  .faq-banner h1,
  .about-banner h1,
  .contact-banner h1,
  .policy-banner h1,
  .default-banner h1 {
    font-size: 1.5rem;
  }

  .children-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}